Explain an activity to find out whether the work done is positive or negative.
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Q3
While swimming, state whether the work done by the force is positive or negative ?
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Q4
Define chemotropism. Give one example of chemotropism. State whether this example is of positive chemotropism or negative chemotropism.
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Q5
Write the reasons whether the work done by the applied force is zero, positive, or negative. Also mention against each force a kind of work to be done.1. A laborer lifting a brick.